Dating line illinoise
Within a year or two, most glass insulators produced at Muncie were carrying date codes.Owens-Illinois continued to have the great majority of insulators marked with the “HEMINGRAY” brand name, with very few exceptions in later years.(Photo courtesy of Taylor Mc Burney)" width="640" height="574" data-recalc-dims="1" data-lazy-srcset="https://i1com/ If anyone has information on exactly what year the mark O-I was first used on their bottles, please contact me!Other marks include “ILLINOIS“, a brand name apparently used for a line of prescription bottles (similar to their bottles marked “OWENS”); “DURAGLAS“, a trademark used after 1940 and which appears embossed on innumerable bottles of many types; and “LOWEX” another brand name which was used for their borosilicate glass forumula employed especially for power line insulators.
Many millions of insulators were made at Muncie, up to 1967.(The second most common mark encountered is probably that of the Hazel-Atlas Glass Company.) Owens-Illinois took over operation of the Hemingray Glass Company factory, located in Muncie, Indiana, in 1933.